# Chapter 1 - Section 1.8 - Multiplication and Division of Fractions - Exercise - Page 48: 43

$80$ board feet

#### Work Step by Step

RECALL: Number of Board Feet = $\dfrac{\text{number of boards} \times \text{thickness} \times \text{width} \times \text{length}}{12}$ where thickness, width, and length are all in inches. Using the formula above gives: Number of Board Feet = $\dfrac{10 \times 2 \times 4 \times 12 }{12}=80$

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